Self-Regulating Active Chilled Beams
Doktorsavhandling, 2020
The objective of this thesis is to investigate the function of self-regulating active chilled beams in order to improve design and operation of such systems. Based on experience from existing systems, a hypothesis is that current models and knowledge do not fully capture the behavior of self-regulating active chilled beams.
The work has been carried out through measurements in an experimental facility, building performance simulations and analysis of operational data from an actual building. The purpose of the measurements was to develop a model of an active chilled beam and also to validate a modified zone model used to simulate the thermal climate in a room equipped with an active chilled beam. The purpose of the simulations was to determine the peak shaving effect of self-regulating active chilled beams and to study the influence of central control of the chilled water temperature. The purpose of the analysis of operational data was to study the performance of an actual self-regulating active chilled beam system with respect to energy use and indoor air temperatures.
The results show that a higher chilled water temperature generates more induction of room air in the active chilled beam, which is beneficial for the cooling capacity. Induction of room air also increases the internal convective heat transfer in the room, which reduces the required heat transfer area of the active chilled beam. As a consequence of self-regulation, buildings are precooled prior to the peak cooling load, further reducing the required heat transfer area. By increasing the chilled water temperature outside of the summer season, overcooling is avoided without causing thermal discomfort. The analysis of operational data demonstrates the ability to achieve the desired indoor temperatures with self-regulating active chilled beams without the use of a chiller.
Comfort cooling
High temperature cooling
Self-regulation
Active chilled beams
Författare
Peter J Filipsson
Chalmers, Arkitektur och samhällsbyggnadsteknik, Installationsteknik
Induction ratio of active chilled beams - Measurement methods and influencing parameters
Energy and Buildings,;Vol. 129(2016)p. 445-451
Artikel i vetenskaplig tidskrift
A thermal model of an active chilled beam
Energy and Buildings,;Vol. 149(2017)p. 83-90
Artikel i vetenskaplig tidskrift
Modelling of rooms with active chilled beams
Journal of Building Performance Simulation,;Vol. 13(2020)p. 409-418
Artikel i vetenskaplig tidskrift
Performance evaluation of a direct ground-coupled self-regulating active chilled beam system
Energy and Buildings,;Vol. 209(2020)
Artikel i vetenskaplig tidskrift
Filipsson, P., Trüschel, A., Gräslund, J., Dalenbäck, J-O. Peak shaving effect of self-regulating active chilled beams
Chilled water temperature control of self-regulating active chilled beams
SINTEF Proceedings,;Vol. 5(2020)p. 230-237
Paper i proceeding
Självverkande kylbaffelsystem
Svenska Byggbranschens Utvecklingsfond (SBUF) (12813), 2013-05-01 -- 2016-12-31.
Drivkrafter
Hållbar utveckling
Ämneskategorier
Energiteknik
Annan samhällsbyggnadsteknik
Styrkeområden
Energi
ISBN
978-91-7905-263-8
Doktorsavhandlingar vid Chalmers tekniska högskola. Ny serie: 4730
Utgivare
Chalmers
Opponent: Prof. Jeffrey Spitler, Oklahoma State University, USA